# 分支语句
# num1 = input("输入一个数字：")
# num2 = input("输入一个数字：")
# print(num1+num2)
# if int(num1) < int(num2):
#     print("数字二比数字一大")
# elif num1 > num2:
#     print("数字一大于数字二")
# else:
#     print("数字一等于数字二")

score = int(input("请输入学生成绩："))
grade = ["优秀","良好","一般","及格","不及格"]
if 0 <= score <= 100 :
    num = score//10
    if num>=9:
        num = 9
    elif num < 6:
        num = 5
    grade = grade[4-num]
    print("你的分数为:{0}成绩{1}".format(score,grade))
else:
    print("成绩输入有误，请重新输入！")